Liquid-dispensing pump



June 15 1926.

R. E. WILSON LIQUID DISPENSING PUMP Filed Nov. 12, 1923 Patented June15, 1926.

UNI-TED STATES- PATENT OFFICE.

ROBERT E. WILSON, OI CHICAGO, ILLINOIS, ASSIGNOB TO STANDARD OILCOMPANY,

or wnrrme, mnmna, AND

CHICAGO, ELDIOIS, A COBPORATION OF INDIANA.

LIQUID-DISPENSING .IPUKP.

Application filed November 12, 1828. Serial ma 674,385.

' I n I d i n ThlS lnvention relates to improvements 1n liquiddispensing pumps, and more particularly 1n the type of pump employed forthe dispensing of gasoline in which an indicator I device, connected toor operated by the reciprocating piston rod of the pump cooperates witha fixed scale indicating the vol ume or gallonage of liquid dispensed.

In accordance with the present invention, 10 means are provided tocooperate with the piston operated indicator whereby the pump may beemployed to indicate not only the gallonage dispensed, but may also beemployed for dispensing a volume of gasoline l aving a fixed price; forexample, most usually a dollars worth of gasoline.

The invention will be clearly understood from the following description,illustrated by the accompanying drawings in which -Figure 1 is a sideelevation of the upper part of the pump construction of this type,embodying the present invention,

Fi 2 is a partial sectional view through the line 22 of Fig. 1, and 3Fig. 3 is a detailed view in rear elevation of a part of the device.-

I In the drawings the numeral 5 indicates the housing for the pumpproper, on which is mounted a smaller housing 6 in which reciprocatesthepiston rod 7 having at its upper end a cross-bar 8 guided in itsmovement by the rod 9 and to which is secured an indicator member 10which projects through a slot 11 formed in the housing 6. .The indicator10, on the outside of the housing is bent. at 11 to form a U-shaped hookaround a vertical bar 12 which is supported on thehousing 6 by brackets13. On the bar 12 are marked at the proper points the gallons of liquid,which'are dispensed when the pump is operated to raise theindicator 10to the corresponding position relative to the scale marking.

To the indicator 10 there is secured. back 4.5 of the scale bar 12, anoutwardly projecting indicator member 10", which projects asufficientdistance so that it is ordinarily visible to the operatorduring the operation of the pump.. Parallel to the scale 'bar 12 asecond scale bar 14 is supported on brackets 1?, which are preferablysecured to the brackets 13 on which the scale bar 12 is ,Ipounted. Thescale bar 14 is provided with a series of markings which indicate the Pprices of unit volumes of the liquid being vention is shown inconnection with a pump line.

'25 cent mark is opposite the 4 gallon mark of dispensed, for example,the price per gallon, and these markings are so positioned that, when,in the travel of the pump rod, the indicator 10 comes opposite one ofthe aforesaid markings, the pum has then dispensed a volume'of the hquihaving a certain fixed value, the rice per unit volume being thatindicated y the marking. To

.facilitate the operation of the device, a

slidable indicating member 16 is mounted 05 on the scale rod 14, beingprovided with ooves 17 into which the scale bar fits. crews 18 arelikewise provided on the back of the indicator member 16, these screwsbeing located adjacent the grooves 17 so that, when screwed down, theysecure the indicator member firmly in position on the scale bar. Anopening 19 isprovided on the face of the indicator member 16, and thecontour of this opening is such as to rovide pointers 2O alined with an"externa y proectin pointer 21, these ointers being place upon thedesired mark on the scale.

In the particular form illustrated, the'incapable of dispensing fivegallon s ofvgaso- The scale bar 12 is'provided with markings indicatinallons and half gallons from zero to five. %he upper portion of thescale bar 14 is provided with markings indicating the volume to bedispensed for one dollar, at certain prices per gallon, and it will benoted that the 20 cent mark is o posite the 5 gallon mark of scale 12and t e scale 12. As is readily apparent, the indicator 16 maybe setonthe scale 14 at the prevailing price per allon of gasoline, which maybe, for examp e, 21 cents per gallon. If a customervdemands a dollarsworth of gasoline,-the operator then pumps gasoline until the pointer 10of the indicator 10 comes opposite the pointer 21 of the indicator 16,at which time. one dollars, worth of gasoline at 21 cents per gallonwill have been dispensed. It, is readily apparent, that the indicator 16maybecaused to act as a positive sto a projecting'point member bemgengag by ,a suitable pump rod pro jection. 1 As is readily apparent,when the price of gasoline is less than 20 cents per gallon, more thanfive gallons of'gasolirie is to be d1snsed., On the Iowa portions of thescale ar [14 there are prov ded markings lndicat 10 ing prices pergallon less than 20 cents, these markings being so positioned that thevolume dispensed when the indicator 10 comes opposite one of thesemarkings, added to five gallons, constitutes the volume of gasolinehaving the fixed price of one dollar. Although the present invention hasbeen described in the connection with the details of construction of aspecific embodiment thereof, it is not intended that these details shallbe regarded as limitations upon the scope thereof, except in so far asincluded in the accompanying claims.

ll claim:

1. In a liquid dispensing pump having a reciprocating piston rod, anindicator movable with the piston rod and a volume scale cooperatingw1th the indicator, a second scale substantially parallel to the volumescale, said second scale having on its face mark- .ings designated bythe prices of unit volumes of the liquid, said markings being sopositioned that, when the pump rod indicator is brought into alinementtherewith, a volume of gasoline having a fixed value at the designatedprice per unit volume is dispensed.

2. A pump having a reciprocable piston rod, an indicator immovabletherewith, a volume scale cooperating with said indicator,

eeaoaa a second scale parallel to and spaced from the volume scale, theindicator projecting therebetween, a slidable indicator member on thesecond scale, means for securing said indicator member in predeterminedposition on the second scale, said second scale having on its facemarkings designated by the prices of unit volumes of the liquid, saidmarkings being so positioned that, when the pump rod indicator isbrought into alinement with the indicator member on the second scale,the said indicator member being positioned at one of said markings, thevolume of liquid dispensed has a predetermined fixed value at thedesignated price per unit volume.

3. In a liquid dispensing pump having a reciprocating piston rod, anindicator mov able with the piston rod, a volume scale cointoahnementwith any one of the same, a volume of liquid represented by apredetermined unit value at saidmarking is dispensed.

Bonner nwitsou.

operating with the indicator, and a second

